Saturn is the sixth plant from our sun, and known for its rings. “Ultraviolet” means “beyond violet”, violet being the color of the highest frequencies of visible light. Ultraviolet has a higher frequency (thus a shorter wavelength) than violet light. Although not related to the image ‘Saturn’s Rings in Ultraviolet Light’, the following information was in the description.
“The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA’s Goddard Space Flight Center manages the telescope. The Space Telescope Science Institute conducts Hubble science operations. Goddard is responsible for HST project management, including mission and science operations, servicing missions, and all associated development activities.”
Image is from the NASA Goddard Space Flight Center. File is licensed under Creative Commons Attribution 2.0 Generic (CC BY 2.0). Credit: NASA and E. Karkoschka (University of Arizona). Information from Wikipedia(CC BY-SA 3.0).